Boiler-tube cutter.



No. 764,636. PATENTED JULY 12, 1904 E. SHAOKELFORD.

EOTLEE TUBE CUTTER.

APPLICATION FILED APR. 2, 1903.

N0 MODEL. I

$319.1. Z 5 3 6 i a Z m 721 1; x a f 5 L UNITED STATES Patented July 12, 1904.

PATENT QFFIQE.

BOlLER-TUBE CUTTER.

SPECIFICATION forming part of Letters Patent No. 764,636, datedy 12, 1904.

Application filed .Lpril 2, 1903. Serial N0r 150,785. (N0 model.)

adjusted into position for work or removed from such position, is economical and compact in structure, and rapid and reliable in operation, and in which the cutting-tool can be instantly adjusted into place and removed for repair or renewal.

W'ith this object in view the invention consists in the improved construction, arrangement, and combination of the parts of a tubecutter which will be hereinafter fully de- 'scribed and afterward specifically claimed.

I have illustrated my invention in the accompanying drawings, in which- Figure 1 is a longitudinal vertical sectional View illustrating the invention in position in a boiler-tube, the handle of the ratchet-wrench being broken away. Fig. 2 is a view of the device removed from the tube in bottom plan view, partly broken away to expose one of the rollers. Fig. 3 is a transverse vertical section of the device as shown in Fig. 2 on the lines 3 3 of Figs. 1 and 2.

Like letters of reference mark the same parts in all the figures.

Referring to the drawings by letters, a indicates the main body of the tool, which is preferably in the form of a cylinder of metal provided with a recess or chamber 5 open at the bottom and extending vertically and longitudinally a considerable portion of the length of the body. From this recess or chamber 7) a continuation thereof at the inner end of the chamber, as at 0 in Figs. 1 and 3, extends through the upper surface of the body, both chambers Z) and 0 being rectangular in cross-section. In the chamber 0 is located the cutting-tool (Z, which is freely rota- .ing effected by means of a lever g, pivoted on a pin it and located in the longitudinal chamber 7), the forward end of said lever being located beneath and forming the support of the cutter-block f, while its rear end is engaged by a set-screw or adjusting-bolt 2',

threaded through the upper side of the body (I.

727' indicate two rollers, although their number may be varied, which are pivoted or journaled in longitudinal recesses 71: in the body (1,, preferably on its lower side, the outer end journals of said rollers] being located in ahead or end piece Z, secured to'the inner end of the body a by means of screws m.

At 02 is shown a collar adapted to be slipped upon the body a and to be secured in any desired position by means of a set-screw 0. The outer end of the body a is reduced and squared, as at p, to receive a ratchet-wrench g, which is held in position by means of a nut 1'.

' s indicates a portion of a boiler-head, and

2, a portion of a tube secured therein.

The operation of the device may be described as follows: The parts being in position, with the cutter (Z projecting slightly beyond the circumference of the body a, the inner end of the instrument is inserted in the tube t until the cutter (Z reaches the point at which the tube is to be cut off. The collar 71, is now slipped along the body a until it contacts with the boiler-head or the outer head of the tube, where it is secured in position by the setscrew 0. The screw is now turned inward against the lever ,0 until the cutter (Z is brought into forcible contact with the interior of the tube, the rollers 7'. being in contact With the interior of the tube substantially diametrically opposite to the point of contact with the cutter. The whole implement is now turned by means of the ratchet-wrench 9 until the cutter makes an annular groove inside of the tube, after which the screw ii is further turned inward, throwing the cutter (Z further outward, and the tool again turned until a cut of suiiicient depth has been made in the tube or the tube entirely cut off.

The implement is compact and of economical construction, all of the operating devices being substantially included within the area of the body a in that portion which enters the tube. The depth of the cutter in the tube is readily and quickly maintained by the collar n and set-screw 0 and its depth of cut quickly adjusted through the medium of the screw 71, both of the adjusting-screws 21 and 0 being located outside of the boiled-head and readily accessible. The chambers in which the cutter, cutter-block, and adjusting-lever are located may be made in the body by casting said body, and the rollers 7', while afl'ording a substantially frictionless bearing on the inside of the tube, are readily inscrtiblc and removable by means of the head Z and screws on.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

1. In a tubecutter, the combination with a cylindrical body, provided with a longitudinal chamber open at the bottom and a branch therefrom open through the top, of a cutterbloelz mounted in the branch chamber, a rotary cutter journaled in the block, a lever pivoted in the longitudinal chamber and supporting the cutter-block at its forward end, and a set-screw threaded through the upper side of the body and bearing upon the rear end of the lever, substantially as described.

2. In a tube-cutter, the combination with a end of the lever, an inner head removably secured to the body, and longitudinal rollers located in recesses in the lower side of the body, projecting slightly beyond the periphery thereof and journaled at their inner ends in the body and their outer ends in the removable head, substantially as described.

3. In a tube-cutter the combination with a cylindrical body, of a cutter mounted to move radially therein, a lever supporting at its outer end the cutter, a set-screw threaded through the body and bearing upon the outer end of the lever, a movable collar on the body, means for securing it in any adjustment, means for turning the body on its longitudinal axis, and friction-rollers projecting from the periphery of the body opposite to the cutter, the cutter and collar adjusting means being located outside the tube in which the cutter is operated, substantially as described.

In testimony whereof I afiix my signature.

EDGAR SHACKELFORD In presence of IVIURRAY G. Hoornn, EDWIN DAsrniiLL. 

